Electric switch



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I. W. ULLMAN. BLBGTRIG SWITCH. ANo. 530,293. Patented Dec. 4, 1894.1v

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l @mw/hoff, NWMW @5.6 www QNQMM UNrTEQD" STATES PATENT 'Frasca IKE WISE ULLMAN, OF IRMINGHAM, ALABAMA.

ELECTRIC SWITCH.

:SPECIFICATION forming part of Letters Patent No. 530,293, dated December 4,1894.

Application filed September 28, 1894.. Serial No. 524,380. (No model.)

To all whom it may concern):

Be it known that I, IKE WISE ULLMAN, a

citizen of the United States, residing at Birl mingham, in the county of Jefferson and State of Alabama, have invented certain new and useful Improvements in Electric Switches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. p

vMy invention relates to improvements in that class of electric switches having a contact with both Wires; and the objects of my improvements are, first, to provide an electric switch of that description of a simple and cheap construction which can be easily and cheaply manufactured, the switch having a contact bolt operated by the oscillating movement of a lever pivoted in a'frameattached to the base; second, to provide an 'electric switch having a contact bolt operating in a groove formed in the base the bolt provided with a yoke havingr coiled springs on the sides to give the bolt a swift motion in and out of Contact; third, to provide an electric switch having a contact bolt made of non-conducting material, the bolt having heads on both ends provided with electric contacts to engage electric contact brushes attached to binding posts placed on both sides ofl the bolt fourth, to provide an electric switch with a set of binding posts having conducting wires connected thereto, a second set of binding posts having conducting wires connected to the posts carrying the contacts by fusible cut outs to prevent danger from excessive current. I attain these objects by the mechanism and the arrangement of the parts illustrated in the accompanying drawings, in which- `Figure 1 is a top view of my switch, the cover removed to show the parts. Fig. 2, is a vertical cross sectional view through the center of the contact bolt. Fig. 3, is a vertical longitudinal sectional view through the center of the switch the operating lever standing in a vertical position. Fig. 4., is a detail top view of a part of the base the Contact bolt shown in a horizontal sectional view through the center of the bolt. Fig. 5, is a detail top view of the yoke for contact bolt.

Similar figures refer to similar parts throughout the several views.

The-base l is made of any suitable nonconducting material. A groove 2 is formed -in the upper side, the groove extending across the face. The groove is enlarged in width in the center, to allow the yoke hereinafter described to operate.

' The contact bolt 3 is made of any suitable non-conducting material, the bolt having tapering heads formed on both ends, the heads provided with electric Contact tips, the tips attached to the non-conducting material of the bolt, by any suitable means. The contact bolt is formed to fit the groove in the base, and to slide freely therein.

A metallic lever frame 5 is attached to the base by screws. The lever stand is provided with a vertical lever 6 having a cross head formed on its upper end. The lever is pivoted `in jaws' 7 formed on the head of the stand.

rlfhe yoke 8 for contact bolt, is made of metallic material. The yoke consists of two me-v tallic plates connected together by the rivets 9. 9. The rivets are inserted through slots 10. 10, formed in the Contact bolt. The yoke is provided on both sides with lugs ll. 1l having arms 12. 12 pivoted therein, the ends of the arms extending through apertures formed in the uprights of the lever frame. On the arms between the lever frame and the lugs, are placed coiled springs 13. 13 as shown. The upper side of the yoke is provided with a concave recess 14 for the lower end of the lever to operate in, to move or slide the bolt inthe groove.

Two metallic binding postsl. 15, are attached to the base in the usual manner by screws. The binding posts are provided with clamping heads 16. 16 as shown.

Two conducting Wires 17. 17 lead through apertures formed in the base. The ends of the conducting Wires are inserted in chambers formed in the binding posts. The wires are secured and kept in contact to the posts, by binding screws 18. 18 attached to the posts by screw threads.

Two metallic binding posts 19. 19, are at- IOO and proportioned to conduct the desired amount of current are provided. The fuse wires are attached and connect both sets of binding posts as shown, the fuse wires kept to place and in contact with the posts, by the pressure of the binding heads on the posts.

Two metallic binding posts 23. 23 are attached to the base by screws as shown. The posts are provided with extension bases having electric contact brushes 24. 24 attached. The conducting wires 25. 25 are attached to the binding posts. The ends of the wires are inserted from the under side in chambers formed in lthe posts,and the Wires are held to place and in contact with the posts, by binding screws 26. 26 attached to the posts by screw threads. A cover 27 is provided to cover and inclose the parts of the switch in the usual manner.

To operate the switch, if in contact as shown by t'ull lines of drawings, and it is desired to throw the switch out of contact,the head ofthe lever is moved in the direction of the position shown by dotted lines, the bottom part of the lever at the same time moving the yoke 8 in an opposite direction, the yoke sliding on the body of the bolt 3 without moving it. As the yoke is drawn toward the cente r,it draws the arms carrying the springs to the position of a straight line with each other. The instant the yoke passes the center, the action of lthe springs throws the bolt swiftly to the position shown by dotted lines. The reverse movement is performed in the same manner, the lever carrying the yoke past the center without moving the bolt, the action of the springs then throwingthe boltswiftlyinto contact as shown by the full lines, the swift motion of the bolt preventing arcing at the point of contact.

Having thus described mynvention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination in an electric switch, of a base having electric contact brushes attached to binding posts thereon, electric conducting wires attached to the posts, a metallic frame carrying a lever pivoted therein the frame attached to the base, an electrically insulated bolt operating in a groove formed in the base the bolt provided with tapering heads having electric contact tips, a metallic yoke embracing the bolt the yoke attached to the boltby rivets operatingin slots formed therein, two arms pivoted to the yoke the ends ot the arms extending through apertures formed in the lever frame, coiled springs operating on the arms between the frame and the yoke, a concave recess formed on the upper side of the yoke, the lower end of the lever engaging the concave recess to operate the bolt to engage or disengage the bolt to the contacts on the binding posts, substantially as and for the purpose described.

2. The combination in an electric switch, of a basehaving electric contact brushes attached to binding posts thereon, a bolt electrically insulated adapted to slide in a groove formed in the base the bolt having heads provided with electriccontacttips,a metallic yoke embracing the body of the bolt and attached thereto by rivets operating in slots formed therein, two arms ca'rrying coiled springs pivoted in the yoke, a frame attached to the base the frame carrying a lever pivoted therein, the lever operating the bolt to engage or disengage `the stationary contacts, substantially as and for the purpose set forth.

In testimony whereof I aix my signature i'n presence of two witnesses.

IKE VISE ULIIMAN.

Witnesses:

DAVID MARX, ED. G. ULLMAN. 

